Shank stiffener



M m, z w q w, @i Q o i 2. 6. J ma my w F, Mm@ d @ma 5. 9 1 5, W 1 v. wd M @19'14- EI @il Patented Nov. 15, 1927.

UNITED STA CHESTER M. MOORE, OF VAKEFIELD, MASSACHUSETTS, ASSTGNOR T0 FIOORE SHANK COMPANY, OF EVERETT, MASSACHUSETTS, A CORPORATION OF MASSACHUSETTS.

' SHANK STIFFENER.

Application led July 24, 1925. Serial No. 45,941.

This invention relates to shank stiffeners and aims to provide an improved stiifener having, among others, the advantages herein pointed out. Y

In the drawings of one embodiment of my invention described and illustrated herein,

Fig. 1 is a plan or top view; l

Fig. 2, an edge view;

Fig. 3, a bottom view;

Fig. 4, a broken out longitudinal section .on an enlarged scaleon the line 4 4, Fig. 1;

- Figs. 5,6 and 7 respectively, plan, edge and bottom views of a stiffener of different shape; l

Figs. 8, 9 and 10, plan, edge and'bottom views respectively, of another form of stiffeller; f Figs. 11, 12 and 13 respectively, plan, edge and bottom views of a modified form of spur; and k y Figs. 14, 15, 16 and 17 still further modified forms of spurs. y Referring first to Figs. 1. 2, 3 and v4, my novel shank stiffener comprises preferably a narrow strip or lbody 1, of suitably tempered material, as metal, drilled or punched at suitable points, herein two, 2, 3. A suitable spur which is preferably an untempered t-ack 4 is inserted through the body 1 in the direction desired from the back or bottom face. This spur is then secured in position in the body in any Asuitable manner, preferably by upsetting some of the metal of the shank of the spur against the upper face `0r top of the body 1. There are several ways in which this can be done and the one that I pref-er to use consists in driving the tack into a mold or die that is slightly too small for it, whereby some of the metal on the side faces of the shank of the tack will be forced up toward the head of the tack and against the body 1, and into the hole 2 partly filling itwith the tack shank and locking the latter tightly therein, see. Figs. 1, 2, 8, 4, so that the stiffeners may thereafter be hanl dled and shipped freely with no danger of the tacks coming out. rlhis type of stitl'ener is frequently used on insoles. If a tack with a round shank is used, the metal will usually be upset all around it, but if a tack with an oval shank is used, the metal may be upset only part way around the shank. This construction is preferred to a construction where the holes 2-3 are drilled of a uniform size somewhat smaller than the tack shank, andcording to the nature of the shank stifiener material and is not sufliciently uniform for ygood results. Even if the tack is held sufficiently firmly by friction, it is not at all i certain that it will beheld upright relative to the shank stift'ener, but frequently it will bebent over or cant-cd and must be straightened by hand before it` can be driven into position in the shoe, ent-ailing a loss of time.

Furthermore, the'friction will vary according to whether the tack shank is round or oval,fboth kinds being used, and such stift'` ener cannot be shipped and handled safely.

Or, if the-tack is driven through a soft shank stiff-ener not drilled and the latter then tempered, it will also result in temper.-

ing the tack,which is not desired, andthen the tack must have its temper drawn.

' Again, my constructionis 'an advantage over sucha construction above` pointed out where-the tack is thrust through a previously drilled hole smaller than the tack shank, and some of the metal of th-e tackshank is thereby pushed up and against the shank stiffe'ner because inthe latter case the metal of the tack pushed up by the forcing of the tack through th-e hole in the tempcredstiif- Vener prevents the subsequent proper upsetting to the desired extent of the tack shank aboutand perhaps into the opening in the shank stiffener ;v and further, the shank stiffener metal surrounding the tack shank may be bent out of its proper plane somewhat and will not permit the upset tack shank metal to be vupset as firmly as it ot-herwise would be. if the surrounding shank stiifener metal lay flat and smooth. In my construction the holes having been previously drilled of a size to take the eXtrem-e large size of tack, it matters little whether the tack shank is round or oval, or whether it is of a` uniform size, because the metal is upset over and upon the adjacent face of the shank stifl'ener and partly into the hole inthe shoe shank a filler.

In Figs. 8, 9 and 10 is shown a different shaped stiEener used principally on insoles.

In Figs. 11, 12 and 13 is illustrated a dif'- ferent form of spur for such stiffeners, provided in this case With a collar 5 on the shank which, when the head 6 of the spur, at the loWer end of the stiffener, is headed over as at the upper end, securely locks the tack to the body 1 on the front or upper face, someof the metal being crowded between the spur and opening Wall.

Again in Figs. 14, 15 and 16, is shown a further modification of the spur construction wherein ,the point is inserted through an opening in the body 1, and then further headed over to lock it therein. The blo7 on the head 6 of the tack causes it to partly at least fill in the opening sulficiently tight to securely lock the tack to the body. In Whatever manne-r the tacks may be locked into the body they provide a novel. and superior construction.

In Fig. 17 is shown a construction comprising a double pointed tack, the Shanks of Which may be partly upset against the body 1 in the manner described. v

In the use 'of shank stiffeners of this construction, the tacks will readily be driven straight because they are positioned upright relative to and in the body preferably by machine, While hand positioned. tacks individually handled in the common manner are 'frequently improperly positioned and therefore driven crooked. My novel stiffeners may be more quickly applied than those with tacks loosely inserted, because vso much time is lost picking up and positioning the separate tacks in the latter case. It has been shown that an operator can in the saine length of time apply about three times as many of my novel shank stiifeners with the tacks or spurs there-on he can of the common kind of stiifeners Without spurs.

'My novel shank beingof tempered metal is of course better than an untempered one and the stiifener is thus a better support the. spur is the metal of the previously Y formed tack shank, and Will not break or distort in shape as do metal spurs struck up from the stiifener body Which break frequently When the met-al is turned over and distorted'to form the spurs or break flater from bend strain. Also the spurs of previously fashioned metal are stronger,` as all Y the grain of the metal of the spur shank is compressed and runs in the directionl of,k

travel of the spur. f

Myinvention is not limited to the particular embodiment thereof described and illustrated herein.

Claims.

1. As an article of manufacture, a shoe shank stiifener with Van aperture therethrough, and a pointed spur passed throughV the aperture and permanently secured in position therein by the vspur shank swaged into holding` engagement With the stiffener. 2. As an articlev of manufacture, a shoe shank stifiener With an aperture therethrough, and a pointed spur passed through the aperture and vpermanently secured lin position therein by metal, of the'spur shank displaced and partly filling in the aperture about the spur. Y Y Y SpAs an article of manufacture, afshoe shank stiifener with an aperture therethrough, and a pointe-d spur passed through the aperture and permanently secured in position therein by displaced metal of the spur shank partlyoverlying the aperture.

' In testimony whereof, I have signed my name to this specification.

CHESTER M. MOORE. 

